For hot water to circulate and produce electricity when brought to the surface, an EGS’s basic function is to inject fluid deep below to make new fissures in rock formations.
This technology is especially appealing for military applications because it is positioned as a sustainable substitute for conventional energy sources.
In 2024, Sage Geosystems also announced it had secured a contract with the U.S. Air Force to pilot-test its innovative geothermal energy system, Geopressured Geothermal Systems (GGS), in Starr County, Texas.
This hybrid approach harnesses heat and pressure, presenting a dual energy generation and storage opportunity.
Sage’s previous tests suggested that GGS could compete with more conventional energy storage technologies such as lithium-ion batteries and natural gas peaker plants—a claim the company hopes to substantiate during the pilot phase.